All Outputs (230)

Picosecond acoustics in single quantum wells of cubic GaN/(Al,Ga)N (2017)
Journal Article
Czerniuk, T., Ehrlich, T., Wecker, T., As, D., Yakovlev, D., Akimov, A., & Bayer, M. (2017). Picosecond acoustics in single quantum wells of cubic GaN/(Al,Ga)N. Physical Review Applied, 7(1), Article 014006. https://doi.org/10.1103/PhysRevApplied.7.014006

A picosecond acoustic pulse is used to study the photoelastic interaction in single zinc-blende GaN/AlxGa1−xN quantum wells. We use an optical time-resolved pump-probe setup and demonstrate that tuning the photon energy to the quantum well’s lowest e... Read More about Picosecond acoustics in single quantum wells of cubic GaN/(Al,Ga)N.

Automated extraction of single H atoms with STM: tip state dependency (2017)
Journal Article
Møller, M., Jarvis, S. P., Guérinet, L., Sharp, P., Woolley, R., Rahe, P., & Moriarty, P. (in press). Automated extraction of single H atoms with STM: tip state dependency. Nanotechnology, 28(7), https://doi.org/10.1088/1361-6528/28/7/075302

The atomistic structure of the tip apex plays a crucial role in performing reliable atomic-scale surface and adsorbate manipulation using scanning probe techniques. We have developed an automated extraction routine for controlled removal of single hy... Read More about Automated extraction of single H atoms with STM: tip state dependency.

Diagnosing galactic feedback with line broadening in the low redshift Lyα forest (2017)
Journal Article
Viel, M., Haehnelt, M. G., Bolton, J. S., Kim, T., Puchwein, E., Nasir, F., & Wakker, B. P. (2017). Diagnosing galactic feedback with line broadening in the low redshift Lyα forest. Monthly Notices of the Royal Astronomical Society: Letters, 467(1), L86-L90. https://doi.org/10.1093/mnrasl/slx004

We compare the low-redshift (z 0.1) Lyα forest from hydrodynamical simulations with data from the Cosmic Origins Spectrograph. We find the tension between the observed number of lines with b-parameters in the range of 25–45 km s−1 and the prediction... Read More about Diagnosing galactic feedback with line broadening in the low redshift Lyα forest.

Evolution of cosmic star formation in the SCUBA-2 Cosmology Legacy Survey (2017)
Journal Article
Bourne, N., Dunlop, J., Merlin, E., Parsa, S., Schreiber, C., Castellano, M., …van der Werf, P. (2017). Evolution of cosmic star formation in the SCUBA-2 Cosmology Legacy Survey. Monthly Notices of the Royal Astronomical Society, 467(2), 1360-1385. https://doi.org/10.1093/mnras/stx031

We present a new exploration of the cosmic star formation history and dust obscuration in massive galaxies at redshifts 0.5 < z < 6. We utilize the deepest 450- and 850-μm imaging from SCUBA-2 CLS, covering 230 arcmin2 in the AEGIS, COSMOS and UDS fi... Read More about Evolution of cosmic star formation in the SCUBA-2 Cosmology Legacy Survey.

Optical determination of the Néel vector in a CuMnAs thin-film antiferromagnet (2017)
Journal Article
Saidl, V., Němec, P., Wadley, P., Hills, V., Campion, R. P., Novák, V., …Jungwirth, T. (2017). Optical determination of the Néel vector in a CuMnAs thin-film antiferromagnet. Nature Photonics, 11(2), 91-96. https://doi.org/10.1038/nphoton.2016.255

Recent breakthroughs in electrical detection and manipulation of antiferromagnets have opened a new avenue in the research of non-volatile spintronic devices.1-10 Antiparallel spin sublattices in antiferromagnets, producing zero dipolar fields, lead... Read More about Optical determination of the Néel vector in a CuMnAs thin-film antiferromagnet.

Appearance and disappearance of quantum correlations in measurement-based feedback control of a mechanical oscillator (2017)
Journal Article
Sudhir, V., Wilson, D. J., Schilling, R., Schütz, H., Fedorov, S. A., Ghadimi, A. H., …Kippenberg, T. J. (2017). Appearance and disappearance of quantum correlations in measurement-based feedback control of a mechanical oscillator. Physical Review X, 7(1), Article 011001. https://doi.org/10.1103/PhysRevX.7.011001

Quantum correlations between imprecision and backaction are a hallmark of continuous linear measurements. Here, we study how measurement-based feedback can be used to improve the visibility of quantum correlations due to the interaction of a laser fi... Read More about Appearance and disappearance of quantum correlations in measurement-based feedback control of a mechanical oscillator.

Highly excited strings I: Generating function (2017)
Journal Article
Skliros, D. P., Copeland, E. J., & Saffin, P. M. (in press). Highly excited strings I: Generating function. Nuclear Physics B, https://doi.org/10.1016/j.nuclphysb.2016.12.022

This is the first of a series of detailed papers on string amplitudes with highly excited strings (HES). In the present paper we construct a generating function for string amplitudes with generic HES vertex operators using a fixed-loop momentum forma... Read More about Highly excited strings I: Generating function.

Spin-orbit torques in locally and globally non-centrosymmetric crystals: antiferromagnets and ferromagnets (2017)
Journal Article
Železný, J., Gao, H., Manchon, A., Freimuth, F., Mokrousov, Y., Zemen, J., …Jungwirth, T. (2017). Spin-orbit torques in locally and globally non-centrosymmetric crystals: antiferromagnets and ferromagnets. Physical Review B, 95(1), Article 014403. https://doi.org/10.1103/PhysRevB.95.014403

One of the main obstacles that prevents practical applications of antiferromagnets is the dfficulty of manipulating the magnetic order parameter. Recently, following the theoretical prediction [J. Železný et al., PRL 113, 157201 (2014)], the electric... Read More about Spin-orbit torques in locally and globally non-centrosymmetric crystals: antiferromagnets and ferromagnets.

Unintentional boron incorporation in AlGaN layers grown by plasma-assisted MBE using highly efficient nitrogen RF plasma-sources (2017)
Journal Article
Novikov, S. V., & Foxon, C. (2017). Unintentional boron incorporation in AlGaN layers grown by plasma-assisted MBE using highly efficient nitrogen RF plasma-sources. Journal of Crystal Growth, 477, 154-158. https://doi.org/10.1016/j.jcrysgro.2017.01.007

Plasma-assisted molecular beam epitaxy (PA-MBE) is now widely used for the growth of group III-nitrides. Many years ago it became clear that during PA-MBE there is unintentional doping of GaN with boron (B) due to decomposition of the pyrolytic boron... Read More about Unintentional boron incorporation in AlGaN layers grown by plasma-assisted MBE using highly efficient nitrogen RF plasma-sources.

Role of interactions in a dissipative many-body localized system (2017)
Journal Article
Everest, B., Lesanovsky, I., Garrahan, J. P., & Levi, E. (2017). Role of interactions in a dissipative many-body localized system. Physical Review B, 95(2), https://doi.org/10.1103/PhysRevB.95.024310

Recent experimental and theoretical efforts have focused on the effect of dissipation on quantum many-body systems in their many-body localized (MBL) phase. While in the presence of dephasing noise such systems reach a unique ergodic state, their dyn... Read More about Role of interactions in a dissipative many-body localized system.